Table 2.

Terminal Branch Lengths

Gene	Average length	Range	Standard error
env	0.09	0.03–0.24	0.0016
gag	0.06	0.01–0.11	0.0012
nef	0.06	0.01–0.13	0.0014
pol	0.05	0.02–0.10	0.0008
rev	0.06	0.01–0.17	0.0021
tat	0.05	0–0.18	0.0019
vif	0.06	0–0.15	0.0014
vpr	0.06	0–0.17	0.0017
vpu	0.07	0–0.19	0.0021